What to do with « Mastering type » ?
If your audio files go into a CD, choose « CD type Mastering ».
If your audio files’s destination is Digital shop / stream, choose « Digital mastering »
Use case: Recommendation for Loudness of Audio Streaming and Network File Playback
Min Integrated: -20 dB LUFS
Max Integrated: –16 dB LUFS
Max True Peak: -1dB
Loudness: ITU-R BS.1770-3 / EBU – TECH 3341 / ITU-R BS.1771 / EBU R 128
Reference: link
Use case: Online Streaming
Max Integrated: –16 (±1) dB LUFS ( ITU-R BS.1770 / ITU-R BS.1770-4)
Max True Peak: -1dB
Reference: Apple music, Apple podcast
Use case: Online Streaming
Max Integrated: –14 dB LUFS
Max True Peak: -1dB